# 1. Write all the factors of the following numbers : (a) 24      (b) 15           (c) 21           (d) 27       (e) 12 (f) 20       (g) 18           (h) 23           (i) 36

(a) 24 = 1 24

= 2 12

=  3 8

= 4

Hence Factor of 24 = 1, 2, 3, 4, 6, 8, 12 and 24 itself.

(b) 15  = 1 15

= 3

= 5    3

Hence factor of 15 = 1, 3, 5 and 15.

(c) 21 = 1 21

=  3    7

=  7    3

Hence factor of 21 = 1, 3, 7 and 21.

(d) 27 = 1 27

= 3

= 9

Hence Factor of 27 are 1, 3, 9 and 27.

(e) 12=112

=26

=34

=43

Hence Factors of 12 are 1,2,3,4,6, and 12
(f) 20 = 1 20

= 2 10

= 4    5

= 5    4

Hence Factors of 20 are 1, 2, 4, 5, 10, and 20.

(g) 18  = 1  18

= 2    9

= 3  6

Hence Factors of 18 are 1, 2, 3, 6, 9 and 18.

(h) 23 = 1 23

= 23 1

Hence factors of 23 are 1 and 23.

(i) 36 = 1 36

= 2  18

= 3 12

= 4

= 6

Hence factors of 36 are 1, 2, 3, 4, 6, 9, 18 and 36.

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